var chu1 = document.querySelector("#chu1");
var shan1 = document.querySelector("#shan1");
var isBlock = false;
console.log(shan1)
shan1.addEventListener("click", function() {
	if(!isBlock) {
		chu1.style.display = "none"
		isBlock = true;
	} else {
		chu1.style.display = "block"
		isBlock = false;
	}
})

var chu2 = document.querySelector("#chu2");
var shan2 = document.querySelector("#shan2");
var isBlock = false;
shan2.addEventListener("click", function() {
	if(!isBlock) {
		chu2.style.display = "none"
		isBlock = true;
	} else {
		chu2.style.display = "block"
		isBlock = false;
	}
})

var chu3 = document.querySelector("#chu3");
var shan3 = document.querySelector("#shan3");
var isBlock = false;
shan3.addEventListener("click", function() {
	if(!isBlock) {
		chu3.style.display = "none"
		isBlock = true;
	} else {
		chu3.style.display = "block"
		isBlock = false;
	}
})
